Keep strips height when pressing home
There is no way to change this behaviour.


  View all Sequences Home
  Zooms the display to show all strips.


But there is a similiar command.


  View Selected NumpadPeriod
  Zooms in the display to fit only the selected strips.


This will zoom to the selection. An alternative would be to quickly select all then view selected.

A, (A,) NumpadPeriod

This will preserve the height scale.